Throttle.



PATENTED MAY 19, 1908.

J. W. KENNEDY.

THROTTLE.

APPLICATION FILED JUNE 18. 1907.

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THROTTLE. ATPLIOATION IILE'D JUNE 18. 1907.

Q t W M w JAMES WILLIAM KENNEDY, OF BURKE, NEW YORK.

THROTTLE.

Specification of Letters Patent.

Patented May 19, 1908.

Application filed June 18, 1907. Serial No. 379,543.

To all whom it may concern:

Be it known that 1, JAMES W. KENNEDY, citizen of the United States, residing at Burke, in the county of Franklin and State of New York, have invented certain new and useful Improvements in Throttles, of which the following is a specification.

This invention relates to valves and more particularly to throttles, and has for its object to provide a throttle for use in locomotives and similar mechanism, which will include two valves arranged for independent operation, but constructed and disposed in a manner to facilitate their use.

Another object is to provide a structure of this kind in which either valve may be cut off from the steam supply to permit of packing or adjusting operations while the generator is under pressure.

Other objects and advantages will be apparent from the following description and it will be understood that changes in the specific structure shown and described may be made within the scope of the claims without departing from the spirit of the invention.

In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure 1 is a longitudinal section of the boiler of a locomotive, disclosing the arrangement of the throttle; Fig. 2 is a view showing the crown sheet of the boiler and the throttle levers; Fig. 3 is an enlarged detail section taken vertically through the two valves; Fig. 4 is a transverse section through one of the valves.

Referring now to the drawings, there is shown a locomotive boiler 5 having a steam dome 6. A supply pipe 7 is located within the boiler and has an upwardly turned rear Ward end 8 extending into the steam dome. The forward end of the pipe 7 is connected with the cylinders in the usual manner. The supply pipe 7 extends longitudinally of the boiler, and a valve rod sleeve 9 communicates with the rearward end portion of the pipe 7 and extends to the crown sheet 10 of the boiler where it is connected with a packing gland 11.

The u per end of the upwardly turned portion 8 o the pipe 7 is closed, as shown, and has formed therewithin, a valve seat 12 which is somewhat elongated, and which has formed therethrough, a lateral passage 13 opening through the inner face of the seat and communicating at its outer end with a steam pipe 14 opening into the steam dome 6, to receive steam therefrom. This pipe 14 is provided with a valve 15 operated by a stem 16 extending out through a gland 17 on the crown sheet 10 and provided with a handle 18 at its outer end by which it may be turned. It will thus be seen that thesupply of steam passing through the pipe 14 may be varied and entirely cut off by the valve 15.

A valve 19 is disposed in the seat 12, and may be moved upwardly, as will be readily understood, to permit the passage of steam into the pipe 7 from the lower end of the seat 12. A lever 20 is pivoted in the lower portion of the portion 8 of the pipe 7 and has pivoted thereto, a valve rod 21, which is engaged in the sleeve 9 and which is passed through the gland 11 for attachment at its outer end to a hand lever 22. As will be seen from the drawings, the arrangement is thus such that the valve 19 may be unseated through operation of the lever 22, the lever 20 being pivoted to the valve 19, as shown. It will thus be apparent that when it is desired to pack the gland 11 or perform other operations necessitating removal of portions of the gland, the valve 15 may be closed, which will relieve the pipe 7 and the sleeve 9 of all pressure, whether or not the valve 19 be seated.

A depending vertical pipe 23 communicates at its upper end with the pipe 7 adjacent to the rearward end thereof, and has a valve seat 24 therewithin at its upper end. A valve 25 works in the seat 24 to close a lateral passage 26 formed through the seat and opening through the inner face thereof, this passage communicating at its outer end with a pipe 27 opening into the steam dome 6 and provided with a mechanical valve 28 similar to the valve 15 and carrying a stem 29, pass' ing out through a gland 30 in the crown sheet 10 and carrying a handle 31. A second valve rod sleeve 32 communicates with the lower portion of the pipe 23, and is secured to a gland 33 mounted in the crown sheet. Alever 34is mounted in the pipe 23 for operation of the valve 25, as shown, and has a valve rod 35 pivoted thereto and passed out through the gland 33 for connection with a hand lever 36. It will thus be seen, that two in dependently operable valves are provided, each controlling the admission of steam to the cylinder, and both being arranged to be cut off from the supply of steam as desired. It will be understood that the valve mechanism indicated at A and including the valve 19 is designed for ordinary use, and it will be observed that when thisvalve is open, the pressure of steam Within the pi e 7 will be against the valve 25 to hold t e latter closed. Should the mechanism A become deranged, the valve 15 is closed, and the locomotive is operated by means of the valve mechanism B which is that including the valve 25.

What is claimed is:

1. In a throttle, the combination with a valve seat, of a valve arranged to work in the seat, a pipe communicating with the seat, a sleeve communicating with the pipe, a gland for the sleeve, a rod slidably engaged in the sleeve and in the gland, connections between the rod and the valve for simultaneous opera tion thereof, a steam supply pipe communieating with the valve and means for closing the supply pipe.

2. The combination in a locomotive, of a steam pipe, a valve for the steampipe, a steam supply pipe communicating with the valve, means for cutting off the supply pipe, a second valve communicating with the first named pipe, a steam pipe communicating with the second valve and means for cutting off the second steam pipe.

3. In a valve mechanism, the combination with a pipe provided with a valve seat, of a steam pipe arranged to admit steam to the face of the valve seat, a valve for the steam pipe, means for operating the valve, a valve in the seat, and means for moving the second valve, a pipe communicating with the first named plpe and having a valve seat at its point of communication with the first named pipe, means for admitting steam to the second named valve seat, means for preventing the admission of steam to the second named seat, and a valve for said seat, said valve being arranged for movement into the first named pipe when it is moved out of the seat, and being disposed to receive the pressure of steam in the first named pipe thereagainst, to hold it in its seat.

4. The combination in a locomotive, of a steam pipe, a valve for the steam pipe, a steam supply pipe communicating with the valve, means for cutting off the supply pipe, a second valve communicating with the first named pipe, a steam pipe communicating with the second valve, valve operating mechanism located within the second named steam pipe and means for operating said mechanism.

In testimony whereof he ailixes his signature, in presence of two witnesses.

JAMES WILLIAM KENNEDY.

Witnesses:

WM. S. COOPER, GEO. A. SMITH. 

